Waste-fitting for fountain-cuspidors.



E. ENNIS.

WASTE FITTING FOR FOUNTAIN CUSPIDOHS.

APPLICATION FILED MAY 4. i918.

Patented Apr. 8, 1919.

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EDWARD'ENNIS, or NORTH CAMBRIDGE; MASSACHUSETTS.

' WASTE-FITTING- FOR FOUNTAIN-CUSPIDORS. 9

To all whom it may concern:

.Be it known that I, EDWARD ENNIS, a citizen of the United States, and a resident of North Cambridge, in the county of Middlesex and State of 'Massachusetts, have invented certain new and useful Improve ments in Waste-Fittings for Fountain- Ouspidors, of which the following is a specification. r V l0 My present invention, relates generally to waste fittings for fountain cuspidors, and more particularly to waste fittings for fountain cuspidors for use inconnection' with vertically adjustabledental-chairs and the like which, on account of their vertical movement or adjustment, require either flexible waste fittings, or those having relatively movable parts. n Q The primary object-of my present invention is the rovision of a strong, durable structure wh1ch will be-highly. sanitary, owvingboth to its mamtenance in cleanly condition and itsv avoidance of all 'odors,:and one which will atthe Same time allow for ver- 'tical movementofgthe chair withoutundue friction. V I V .In the accompanying. drawings illustrat- -ing myinvention, r H

Figure 1 is a side'view, partly in elevation, and partly in vertical longitudinal section. l

" Fig. 2 is a detail transverse section taken ontheline22ofFig.1. wm

Fig. 3 is a vertical longitudinal section '35 through a portion of amodified form.

Fig. 4 is a detail horizontal section taken on the line 44 of Fig; 3, and

Fig. 5 is another verticallongitudinal section through a portion ofanapparatus illustrating another slightly modified form. Referring now to these figures, my invention proposes a waste fitting for fountain 'cuspidors, of which the bowl is generally indicated at 10 in Fig. 1, which consists of 4 inner and outer telescoping pipes 11 and 12. respectively, the inner pipe 11 being secured at its extreme upper end to the depending nipple 13 of thebowl 10 by meansof a gasket nut '14 having adjacent the same an 5 annularly grooved collar '15, the lower groove of which: receives and supports'a Washer 16 which projects below thering 15 and fits snugly around thetpipe 11 for a purpose which will be-presentlydescribed.

' I have clearly shown in Figh e pipe and 12.-

Specification of Letters Patent." Patented Apr.-8, 1919.

' Application filed May 4, 1918. Serial No. 232,460.

11 has a materially reduced diameter as compared to the pipe 12 within which it telescopes, coaxial relation of these two pipes being. maintained, although spaced apart, by virtue of an upper gasket nut 17 which threads on the upper end of the outer pipe 12 and which has an opening of the diameter of the pipe 11, through which the latter leads. The spaced co-axial relation of these pipes is also maintained by a spacv ing ring18 which is set into the outer pipe 12. at a point materially-below the upper end-thereof, the inner diameter of which lring corresponds with the outer diameter,

of'fthe inner pipe 11, so that the latter in 70. its vertical movements with thebowl 10,

; which bowl is as usual secured in .anysuitpipe 11 when the parts are in lowermost position, as to eflfectively prevent exit of any odors whichmay have collected in the space between the inner and outer pipes 11 80 Between the gasket'n atthe upper endof the outer pipe and the lower-inner guide. ring 18, the inner pipe 11 is provided with a pair of washers 19 and20, both of .85 V

, which move with the pipe 11,'thewasher 19 cooperating with the lower inner surface 7 of the gasket nut 17 as a seat when the bowl lOand pipe 11 are raised, andwasher20 similarly cooperating with theupper surface or ring 18 when thesaidzparts are lowered, both for thepurpose ofleifecting. seals against all odors.

It is intended that the pipe 11 shall, as seen in Fig. 1, be extended at its lower end a suflicient depth within the outer pipe to avoid the discharge of fluid matter against any portion of the inner surface of the outer pipe 12 from which such fluid might in turn be deposited upon that portion of the outer surface of the inner pipe 11 which pro ects atany time above the gasket nut 17 at the upper end of the outer pipe. This can be done very readily where the waste fittmg can beextended vertically and downwardly 105 through a floor as seen at A in Fig. 1,.to which the lower threaded portion of the V outer pipe 12 is locked by nuts 21. and 22.

stalled on the upper surface of the floor and in order to bring about substantially the same result, I may provide the inner lower end of the inner pipe 11 as seen in Fig. 3, with an inwardly projectingflange 23, the

upper surface of which is beveled to cooperate and form a snug joint with the lower beveled surface of the external flange 2st at the upper end of a depending movable telescoping extension pipe 25, the latter of which projects downwardly .from the lower inner end of the pipe 11 into the lower portion of the outer pipe 12". Thus when the inner pipe is elevated as seen in Fig. 3, the extension pipe 25 lowers by its own weight and the flanges 23 and 24 come into engagement with one another so that the fluid matter will be discharged into the very lowermost portion of the outer pipe 12, and when the inner pipe 11 is lowered, the lower end of the extension pipe 25 will engage the elbow 26 or other fitting at the lower end of the pipe 12*, and will yield vertically within the inner pipe 11 as the latter continues to move downwardly to the full length of its stroke.

The extension pipe 25 is preferably provided with an external annular flange or rib 27 adjacent its lower end which will prevent its accidental movement upward into the pipe 11 beyond the flange 23, and the last mentioned flange may, if it is found necessary, be provided with recesses 28 around the .extensionpipe- 25, and as best seen in Fig. l,

in order to provide for the ready discharge of any fluid which may have found its way past the flange 24L and into the space between the flanges 23 and 24, when the extension pipe 24; is elevated within the pipe 11 in the position shown in dotted lines in Fig. 3.

In case a square or other exposed connection 26 is utilized at the lowerend of the outer waste pipe of Fi 4, the extension pipe 2 5 as seen in this flgure, may be concaved as seen at 29 in order to provide for free discharge of fluid therefrom in its lowermost position in engagement with the connection 26*.

It is obvious from the foregoing that my invention is susceptible of various slight modifications and changes without departing from its spirit, and it is equally obvious that in either of the forms herein shown and described, my invention is capable of eflective and efficient use for the intended purpose and the particular construction proposed will maintain the outer surface of that portion ofthe inner pipe which may be exposed above the upper end of the outer pipe when the dental chair is elevated, in a cleanly sanitary conditlon much to be desired particularly in dental oflices where a neat clean appearance is not only to be desired, but is essential. v

It is'also'to be observed that'in thus-propose described.

o 4:. A waste fitting for fountain cuspidors,

viding for a clean, neat appearance by the spacing of the telescoping pipes with respect to one another, my invention proposes allied improvements whereby to avoid the danger of discharge of odorswhich might otherwise freely take. place by virtue of such spacing.

inner pipe 11 may have an internal perforate plate 30 as seen in Fig.1 which'will obviate noise in the falling of fluid through the pipe.

It is to be understood, of course, that any suitable means may be utilized to secure the bowl 10 and pipe 11 to a dental chair and the like. p '2 I claim:;

1. A waste fitting for fountain cuspidors, consisting of inner and outer telescoping pipes in spaced relation, the outer pipe hav- 7 mg guides for the inner pipe, in its relative movement one of which guides is in the form of a gasket .located at the upper end ofthe outer pipe and'cl'osi'ng the space between the V 'pipes, the inner pipe having an "annular grooved ring adjacent itsupperouter end,

and a washer supported in the groove ofthe ring and projecting below the latter for engagement with the gasket'of the outer pipe when the inner pipe is .in its lowermost position. 2. A waste fitting for fountain, cuspidors, consisting of a pair'of telescoping pipes in spaced relation of which the inner pipe is movable 'vertically, and the outer pipe is provided with vertically spaced guides for the inner pipe to maintainthe pipes in co axial relation forming a uniform annular space between them, said inner pipe being provided with washers therearound and movable therewith between the guides of the outer pipe and 'for cooperation of the latter in the upper and lower positions of the inner pipe to seal the said annular space and prevent discharge of'odors. 3. A waste fitting 'for fountain cuspidors,

comprising a pair of telescoping pipes in spaced relation of which the outer pipe is limiting the movement of the extension pipe with respect to the inner pipe for the purcomprising aepair oftele's'coping discharge V in spaced relation an i es arran ed in s aced co-axial relation means for guiding the inner pipe in its movement, and a telescoping extension pipe at the lower end of the inner pipe, said inner pipe and its extension pipe having relatively engaging flanges limiting, the movement of the extension pipe with respect to the inner pipe.

5. A waste fitting for fountain cuspidors, comprising an outer stationary pipe, an inner pipe telescoping within the outer pipe 3 provided with an inwardly projecting annular flange at its lower end, guides for the inner, pipe in its movement, and an extension pipe at the inner end of the inner pipe and having a flange at its upper end within the inner pipe to cooperate with the lower inner flange of the latter, the engaging surfaces of sa1d flanges bing beveled to form a snug joint in the encomprising an outer stationary pipe, an inner pipe telescoping within the outer pipe in spaced relation and provided with an inwardly projecting annular flange at its lower end, guides for the inner pipe in'its movement, and an extension pipe at the inner end of the inner pipe and having a flange at its upper end'within the inner pipe to cooperate with the lower inner flange of the latter, the said flange of the inner pipe having recesses around the extension pipe to provide for the ready escape of fluid from the space between the flanges.

In testimony whereof I afiix myv signature.

EDWARD ENNIS.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of rmm,

Washington, D. 0. 

